PIC16F872-E/SS Microchip Technology, PIC16F872-E/SS Datasheet - Page 506

• Manufacturer Part Number: PIC16F872-E/SS
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SSOP,28PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F872-E/SS

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-SSOP
• Package: 28SSOP
• Device Core: PIC
• Family Name: PIC16
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 22
• Interface Type: I2C/SPI
• On-chip Adc: 5-chx10-bit
• Number Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PICmicro MID-RANGE MCU FAMILY
27.5
DS31027A-page 27-10
Design Tips
Question 1:
Answer 1:
Nothing. You probably code protected the device. If this is the case, the device is no longer
usable. See Subsection
Question 2:
Answer 2:
1.
2.
Question 3:
Answer 3:
That is by design. Also remember that Microchip does not recommend code protecting windowed
devices.
Did you re-assemble the source file specifying the PIC16C74A in the INCLUDE file and
LIST directives. The use of the CONFIG directive is highly recommended.
On the device programmer, did you specify the PIC16C74A, and were all the configuration
bits as desired?
I have a JW device and I can no longer program it (reads scrambled data or
all '0's). What’s wrong with the device?
In converting from a PIC16C74 to a PIC16C74A, my application no longer
works.
When I erase the device, the program memory is blank but the configura-
tion word is not yet erased.
27.3 “Program Verification/Code Protection”
1997 Microchip Technology Inc.
for more details.